QTouch 11-key Sensor
Features
• Sensor Keys: – Up to 11 QTouch™ channels
• Data Acquistion: – Measurement of keys triggered either by a signa...
Description
Features
Sensor Keys: – Up to 11 QTouch™ channels
Data Acquistion: – Measurement of keys triggered either by a signal applied to the SYNC pin or at regular intervals timed by the AT42QT1110's internal clock – Keys measured sequentially for better performance, or in parallel groups for faster operation – Raw data for key touches can be read as a report over the SPI interface
Discrete Outputs: – Configurable “Detect” outputs indicating individual key touch (7-key mode)
Device Setup: – Device configuration can be stored in EEPROM
Technology: – Patented spread-spectrum charge-transfer (direct mode)
Key Outline Sizes: – 6 mm x 6 mm or larger (panel thickness dependent); widely different sizes and shapes possible, including solid or ring shapes
Key Spacings: – 7 mm center to center or more (panel thickness dependent)
Layers Required: – One
Electrode Materials: – Etched copper, silver, carbon, Indium Tin Oxide (ITO)
Electrode Substrates: – PCB, FPCB, plastic films, glass
Panel Materials: – Plastic, glass, composites, painted surfaces (low particle density metallic paints possible)
Panel Thickness: – Up to 10 mm glass, 5 mm plastic (electrode size dependent)
Key Sensitivity: – Individually settable via simple commands over serial interface
Adjacent Key Suppression® (AKS™) – Patented AKS technology to enable accurate key detection
Interface: – Full-duplex SPI slave mode (750 KHz), “change” pin, discrete detection outputs
Moisture Tolerance Good Power:...
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